Late Ovulation?

So today I took an ovulation test since today is day 30 and I wasn't getting an LH surge. I didn't test over the weekend because I thought maybe I ovulated early and I missed testing because I was sick. Well I tested and it was definitely positive. Glow says I have a low chance of pregnancy still though. I have never ovulated this late in my cycle and I'm not sure if being sick threw my body off? Anyone ever get a late positive ovulation test in their cycle and still managed to get pregnant? I am having zero period symptoms as well (usually I get all pregnancy symptoms a week before my period is usually due.).